... 气体动力学直径 gas-kinetic diameter 气体发射星云 gaseous emission nebula 气体发生器 expirator; gas generator; gas producer ...
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Messier 27 (M27) is an excellent example of a gaseous emission nebula created as a sun-like star runs out of nuclear fuel in its core.
Messier 27 (M27)是个气体发射星云的典型例子，它是由于类似太阳的恒星耗尽了其核心的核燃料而产生的。
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